Peer support workers (PSW) improve outcomes for people with behavioral health needs, but integrating PSWs into routine behavioral healthcare has been challenging. Certified Community Health Centers (CCBHC), a new comprehensive care model, provides new opportunities to increase access to PSWs. The present study examines whether PSW utilization changed following one organization's transition to a CCBHC. Administrative data from a large behavioral health organization was used to examine changes in peer delivered services before and after CCBHC implementation. Chi-square analyses examined changes in the number of visits delivered by peers. Logistic regression examined differences in the likelihood of accessing PSW services during pre and post timepoints. Following CCHC implementation, the overall number of PSW visits delivered within substance use and transition age youth programs increased. In contrast, the number of PSW visits in community-based intensive case management program decreased. Clients with opioid use disorders were more likely to have accessed PSW services following CCBHC implementation. Results reflect that CCBHC designation generally increased the number of PSW visits within this organization; however, changes in peer service utilization were primarily concentrated among individuals with opioid use disorders and within substance use and transitional aged youth programs. This study provides novel insight into how PSWers are being integrated into the CCBHC model.